chore(deps): update dependency stakater/vale-package to v0.0.15

Author: renovate[bot]

.vale.ini

@@ -1,7 +1,7 @@
 StylesPath = styles
 MinAlertLevel = warning
 
-Packages = https://github.com/stakater/vale-package/releases/download/v0.0.14/Stakater.zip
+Packages = https://github.com/stakater/vale-package/releases/download/v0.0.15/Stakater.zip
 Vocab = Stakater
 
 # Only check MarkDown files